期刊文献+

无表面活性剂法合成形貌可控Pt-Ni催化剂 被引量:2

Synthesizing shape-controlled Pt-Ni catalysts via surfactant-free method
在线阅读 下载PDF
导出
摘要 以丙酸作为调节剂,在非表面活性剂二甲基酰胺溶剂中制备具有(111)优势晶面的八面体/截角八面体Pt-Ni合金,通过调节羧酸的类型,揭示该体系控制形貌和尺寸的机理。丙酸和二甲基酰胺在高温高压下形成的醛是一种弱吸附的表面活性剂,可选择性吸附于Pt-Ni合金的不同晶面上,促进Pt-Ni合金纳米晶的形貌控制。电化学测试结果表明:八面体/截角八面体形貌的Pt-Ni合金催化剂在0. 9 V的氧还原反应活性面密度高达2. 56 m A/cm^2,是商业Pt/C催化剂的13倍,相应的比活性则达到商业Pt/C催化剂的3倍。这是因为八面体/截角八面体Pt-Ni合金催化剂具有(111)优势晶面和洁净的活性表面。 The octahedral/truncated octahedral Pt-Ni alloy nanocrystals with(111) preferential crystal plane by use of propionic acid( PA) as regulators in none-surfactant dimethylformamide( DMF) solvents were prepared. The mechanism of controlling shape and size was revealed. The aldehyde produced by the reaction between DMF and PA under the high temperature and high pressure acting as weak surfactants could be selectively adsorbed on the different crystal planes of Pt-Ni alloy,which facilitated the shape control of Pt-Ni alloy nanocrystals. Electrochemical test results showed that oxygen reduction reaction( ORR) area density at 0. 9 V of Pt-Ni alloy catalysts containing octahedron/truncated octahedral morphology was 2. 56 m A/cm^2,which was 13 times that of commercial Pt/C catalysts,corresponding specific activity was 3 times that of commercial Pt/C catalysts. It was attributed to the(111) preferential crystal plane and cleaned active area of Pt-Ni alloy catalysts.
作者 张娜 陈红 章丹亭 尹鸽平 ZHANG Na;CHEN Hong;ZHANG Dan-ting;YIN Ge-ping(Beijing Aerospace Propulsion Institute,Beijing 100076,China;School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China)
出处 《电池》 CAS CSCD 北大核心 2018年第5期299-303,共5页 Battery Bimonthly
关键词 羧酸 Pt-Ni合金 八面体形貌 氧还原反应(ORR) 燃料电池催化剂 carboxylic acid Pt-Ni alloy octahedral morphology oxygen reduction reaction(ORR) fuel cell catalyst
作者简介 张娜(1986-),女,湖北人,北京航天动力研究所工程师,研究方向:燃料电池组件及系统设计,本文联系人;;陈红(1987-),男,江苏人,北京航天动力研究所高级工程师,研究方向:燃料电池组件及系统设计;;章丹亭(1992-),男,江西人,北京航天动力研究所工程师,研究方向:燃料电池组件及系统设计;;尹鸽平(1957-),女,黑龙江人,哈尔滨工业大学化工与化学学院教授,博士生导师,研究方向:锂离子电池和燃料电池。
  • 相关文献

参考文献3

二级参考文献41

  • 1周智明,徐巧,楼军军,周贞,余从煊.一种催化氧气氧化乙二醛制备乙醛酸的新方法[J].北京理工大学学报,2005,25(5):451-453. 被引量:9
  • 2N oto V D, Negro E. Synthesis, characterization and electrochemical performance of trimetal Pt-free carbon nitride electrocatalysts for the oxygen reduction reaction[ J]. Electrochim Acta, 2010,55 (4) : 1 407-1 418.
  • 3Somorjai G A. Surface science and catalysis[ J ]. Science, 1985,227 (4 689) :902 - 908.
  • 4Tian N,Zhou Z Y,Sun S G. Platinum metal catalysts of high-index surfaces:from single-crystal planes to electrochemically shapecontrolled nanoparticles[ J]. J Phys Chem C, 2008, 112 (50) : 19 801 - 19 817.
  • 5Zhou Z Y, Huang Z Z, et al.High-index faceted platinum nanocrystals supported on carbon black as highly efficient catalysts for ethanol electrooxidation[ J] . Angew Chem Int Ed, 2010, 49 (2) : 411 -414.
  • 6Gasteiger H A, Markovic N M.Just a dream-or future reality? [J]. Science,2009,324(5 923) :48 - 49.
  • 7Arruda T M, Shyam B, Lawton J S, et al. Fundamental aspects of spontaneous cathodic deposition of Ru onto Pt/C electrocatalysts and membranes under direct methanol fuel cell operating conditions :an in situ X-ray absorption spectroscopy and electron spin resonance study[J] .J Phys Chem C, 2010, 114(2): 1 028 - 1 040.
  • 8Bauer J D, Chen X L, Liu Q S, et al. Converting nanocrystalline metals into alloys and intermetallic compounds for applications in catalysis[J] .J Mater Chem,2008,18(3):275 - 282.
  • 9Wang J P, Asmussen R M, Adams B, et al. Facile synthesis and electrochemical properties of intermetallic PtPb nanodendrites[J]. Chem Mater,2009,21(8):1716- 1 724.
  • 10Ghosh T, Leonard B M,Zhou Q, et al. Pt alloy and intermetallic phases with V, Cr, Mn, Ni, and Cu: synthesis as nanomaterials and possible applications as fuel cell catalysts[J] .Chem Mater, 2010,22(7) :2 190 - 2 202.

共引文献6

同被引文献9

引证文献2

二级引证文献3

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部